MY114543A - Method and apparatus for identifying video fields produced by film source employing 2-2 and 3-2 pull down sequences - Google Patents

Method and apparatus for identifying video fields produced by film source employing 2-2 and 3-2 pull down sequences

Info

Publication number
MY114543A
MY114543A MYPI95004165A MYPI19954165A MY114543A MY 114543 A MY114543 A MY 114543A MY PI95004165 A MYPI95004165 A MY PI95004165A MY PI19954165 A MYPI19954165 A MY PI19954165A MY 114543 A MY114543 A MY 114543A
Authority
MY
Malaysia
Prior art keywords
sign bit
pull down
correlators
threshold
film
Prior art date
Application number
MYPI95004165A
Inventor
Correa Carlos
J Christopher Todd
Original Assignee
Thomson Consumer Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson Consumer Electronics Inc filed Critical Thomson Consumer Electronics Inc
Publication of MY114543A publication Critical patent/MY114543A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0112—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards corresponding to a cinematograph film standard
    • H04N7/0115—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level one of the standards corresponding to a cinematograph film standard with details on the detection of a particular field or frame pattern in the incoming video signal, e.g. 3:2 pull-down pattern
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0117—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level involving conversion of the spatial resolution of the incoming video signal
    • H04N7/012—Conversion between an interlaced and a progressive signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0127—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter
    • H04N7/0132—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level by changing the field or frame frequency of the incoming video signal, e.g. frame rate converter the field or frame frequency of the incoming video signal being multiplied by a positive integer, e.g. for flicker reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/11—Scanning of colour motion picture films, e.g. for telecine

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Television Systems (AREA)
  • Image Processing (AREA)

Abstract

A BINARY NUMBER IS GENERATED REPRESENTATIVE OF NET MOTION DURING A FIELD INTERVAL OF AN INTERLACED VIDEO SIGNAL (Y) FROM WHICH A FIELD TO FIELD DIFFERENCE SIGNAL (SN) IS DERIVED HAVING A SIGN BIT (SIGN BIT) AND A GROUP OF MAGNITUDE BITS (D2FLD). THE MAGNITUDE BITS (D2FLD) ARE COMPARED WITH A FIRST THRESHOLD (TH-1) TO PROVIDE A FIRST THRESHOLD INDICATING SIGNAL (T1) WHICH, WITH THE SIGN BIT (SIGN BIT), ARE APPLIED VIA RESPECTIVE BUS LINES TO EACH CORRELATOR OF A GROUP OF FIVE CORRELATORS (401-405). THE CORRELATORS ARE ADDRESSED USING VARIABLE MODULO (424) ADDRESSING TO DETECT PATTERNS REPRESENTATIVE OF 2-2 PULL DOWN AND 3-2 PULL DOWN FILM ORIGINATED FRAMES. LOGIC (440) IS PROVIDED FOR DETECTING WHEN ONE AND ONLY ONE OF THE FIVE CORRELATORS (401-405) INDICATES FILM DETECTION TO VERIFY FILM MODE OPERATION. ERROR REDUCTION IS FURTHER ENHANCED BY COMPARINGTHE FIELD DIFFERENCE SIGNAL WITH A SECOND THRESHOLD (TH-2), HIGHER THAN THE FIRST, TO PROVIDE A SECOND THRESHOLD INDICATING SIGNAL (T2) TO EACH CORRELATOR VIA A SECOND BUS (409). FLAGS ARE PRODUCED FOR IDENTIFYING FILM MODE OPERATION AND FOR IDENTIFYING ALSO WHICH OF TWO ADJACENT FIELDS ARE SUITABLE FOR USE IN SUBSEQUENT VIDEO PROCESSING SUCH AS DE-INTERLACING OR FLICKER REDUCTION. (FIGURE 1)
MYPI95004165A 1994-12-30 1995-12-29 Method and apparatus for identifying video fields produced by film source employing 2-2 and 3-2 pull down sequences MY114543A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/366,799 US5563651A (en) 1994-12-30 1994-12-30 Method and apparatus for identifying video fields produced by film sources employing 2-2 and 3-2 pull down sequences

Publications (1)

Publication Number Publication Date
MY114543A true MY114543A (en) 2002-11-30

Family

ID=23444569

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI95004165A MY114543A (en) 1994-12-30 1995-12-29 Method and apparatus for identifying video fields produced by film source employing 2-2 and 3-2 pull down sequences

Country Status (10)

Country Link
US (1) US5563651A (en)
EP (1) EP0720366B1 (en)
JP (1) JP3908802B2 (en)
KR (1) KR100360919B1 (en)
CN (1) CN1091997C (en)
DE (1) DE69514771T2 (en)
ES (1) ES2141882T3 (en)
MY (1) MY114543A (en)
PT (1) PT720366E (en)
SG (1) SG50388A1 (en)

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Also Published As

Publication number Publication date
DE69514771D1 (en) 2000-03-02
JP3908802B2 (en) 2007-04-25
ES2141882T3 (en) 2000-04-01
EP0720366B1 (en) 2000-01-26
EP0720366A3 (en) 1996-12-27
KR960028125A (en) 1996-07-22
DE69514771T2 (en) 2000-11-16
KR100360919B1 (en) 2003-02-11
EP0720366A2 (en) 1996-07-03
US5563651A (en) 1996-10-08
CN1132437A (en) 1996-10-02
PT720366E (en) 2000-07-31
SG50388A1 (en) 1998-07-20
JPH0918784A (en) 1997-01-17
CN1091997C (en) 2002-10-02

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